Hi All,
I have been working on uClinux kernel on ARM platform recently, and I want
to decrease the kernel stack size from 8K to 4K, i.e. change the following
code (in include/asm-arm/thread_info.h):
#define THREAD_SIZE_ORDER 1
#define THREAD_SIZE 8192
to
#define THREAD_SIZE_ORDER 0
#define THREAD_SIZE 4096
But after this modification, it fails to boot up linux on my ARM development
board now. It stops at the position of pdflush_init(), and the functions
calling chain is as following:
...
->pdflush_init()->start_one_pdflush_thread()->kthread_run()->kthread_create()->wait_for_completion()->wait_for_common()->do_wait_for_common()->schedule()
In schedule() function, below code is executed repeatedly:
if (unlikely(test_thread_flag(TIF_NEED_RESCHED)))
goto need_resched;
So the function schedule() can't return.
BTW, my uclinux version is 2.6.25, and my ARM cpu is MMU-less.
Can anyone give me some advice on this problem. I wonder if we can decrease
THREAD_SIZE to 4K on ARM platform. Some one told me that ARM uClinux needs
separate interrupt stack for 4K THREAD_SIZE. Is that true?
--
Best Regards
Erjian
_______________________________________________
uClinux-dev mailing list
uClinux-dev@uclinux.org
http://mailman.uclinux.org/mailman/listinfo/uclinux-dev
This message was resent by uclinux-dev@uclinux.org
To unsubscribe see:
http://mailman.uclinux.org/mailman/options/uclinux-dev
